基于弯扭耦合的自适应风力机叶片设计  

THE ADAPTIVE BLADE DESIGN OF WIND TURBINE BASED ON BEAM FLAP-TWIST COUPLING THEORY

作　　者：刘旺玉[1] 龚佳兴[1] 刘希凤[1] 张鑫[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《太阳能学报》2011年第7期1014-1019,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50675067;50975090)

摘　　要：探讨了叶片耦合设计的有限元方法。分别运用偏轴碳纤维粱帽与蒙皮两种结构,对1.5MW叶片进行了弯扭耦合等综合参数的设计与评估。分析结果表明,两种方法均能使叶片产生高效的弯扭耦合;但叶片各层纤维的最大拉伸与压缩应变会随偏轴角的增加而增大,最大层间剪切应力也增大,而最大Von Mises应力则会相应下降;同时分析了叶片固有频率随偏轴角的变化,最后将中轴铺层设计运用于叶片非耦合结构中,提高了叶片的抗疲劳性。The FEA coupling design method of the blade was presented. Using the off-axis carbon fiber in the spar cap and skin of 1.5MW blade, respectively, the design and evaluation of the blade＇ s flap-twist parameter were analyzed considering the comprehensive design factors. The results indicated that both of the off-axis carbon spar and skin can achieve the efficient flap-twist coupling. But the maximum fiber strains of tensile and compressive go up with the angle increase of off-axis fiber, which shows the similar change trend of peak interlaminar shear stress. However, while the off-axis angle increase, the maximum Von Mises stress declines. Then, the impact of natural frequencies on the blade design was discussed. area was proved to be helpful to strengthen the Finally, utilizing the medial axis laminates in the blade decoupled blade fatigue resistance.

关 键 词：风力机叶片 自适应性 弯扭耦合 中轴铺层 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]